Electric bolt-releasing device



2 Sheets- Sheet 1..

C. L. H-ENZEL.

ELECTRIC .BOLT EELEA'SING DEVICE.

No. 858875. 'Patented-M81. 8, 1887. fm1.

(No Model.)- 2 vsllee's--sh'eet 2.,

f C. L. HENZEL.

ELECTRIC BOLT RELEASlNCl DEVICE.

No. 858,975. Patented Mar. 8, 1887.

(Y I i @9H/Meson @m-www @M N. PEYERS. PmlLilhogmphar. washington. D. C. V l

UNITED STATES PATENT OFFICE..

GEORGE LUIS I-IENZEL, OF SAN FRANCISCO, CALIFORNIA.

ELECTRIC BOLT-RELEASING DEVICE.

.SPECIFICATION forming part of Letters Patent No. 358,975, dated March 8, 1887.

Application filed May '21, 1886.

To @ZZ whom 15 may concern:

Be it known that l, GEORGE LUIs HENZEL, a citizen of the United States, residing at San Francisco, in the county et' San Francisco and State of California, have invented certain new and useful Improvements in Electric Boltlte leasing Devices for Locks and Latehes, of which the following is a specification.

My invention relates to improvements made in respect of devices for operating the locks and latches of doors from a station or standpoint more or less distant from the door, to give admission at any time to persons without a latch-key, such devices being in use more particularly with the fastenings ot' outside doors or dwellings as a convenience for releasing door-fastenings and giving entrance without the necessity of a personal attendance at the door, the same being an improvement in electric bolt-releasing devices for which Letters Patent of the United States were granted and issued t-o me October 13, 1885, No. 328,030.

My improvements consist in certain novel construction and combination of a pivoted keeper for a bolt or latch actuated by a spiral spring through the medium of a trigger-releasing device operated by an electromagnet, and the necessary battery and connections for making and breaking the circuit as a means for releasing the keeper rlhe construction, application, and operation of these parts and their connections are fully explained in the following description and accompanying drawings, which form a part hereof.

Figure l represents a front view of a double door, with part of one door broken away to show a side view of my improved bolt-releas ing device for locks and latches. Fig. 2 is a right-hand partial end elevation of the mechanism of the boltreleasing device. Fig. 3 is a front view of lock-plate. Fig. 4 is a crosssection through keeper and lock-plate. Fig. 5 is a perspective view of keeper and front of lock-plate. Fig.` 6 is a rear side elevation of the mechanism of my improved bolt-releaser. Fig. 7 is a front view ot' the same, with the mechanism in the same position as shown in Fig. l. Fig. S is a section on line l l of Fig. 7, and Fig. 9 is a section on line l 2 of Fig. '7.

Arepresents the 1eeplate,ofthe usual char- Serial No. 202,013. (No medekl acter, that contains a slot or socket, a, to rethe door and a projecting pin, AX, for actut ating the keeper. A suitable opening is made in the face-plate above the slot c for receiving and operating the keeper, and upon the inner face of the plate is cast suitable posts or studs for supporting the mechanism of the electric bolt-releasing device.

The keeper is composed of a cam or chuck of metal, slotted at B, to form stationary jaws for the bolt of the lock, and a portion ot' the lower end of one jaw is cut away, as at BX, for the passage of the pin AX. The rear portion of the keeper is cut away to form a lug, C, and a rest, CX, for the arm of a lever, to be hereinafter fully described.

The upper end of the cam or keeper is piped and chambered, as at B2, (see Fig. 5,) and around the pipe is coiled a stiff spiral spring, D. One end of this spring enters the body of the keeper, andthe opposite end is confined to the stud plate or post DX, the latter and the stud plate or post Dl forming bearings for the pin E, upon which the keeper operates.

The face of the lug C of the keeper is casehardened, and when in position this lug is engaged by the end of the springplate F on the under face of the lat spring-arm G, which latter is pivoted to the upper end of the studplate D2, its action being limited by the spiral spring d and transverse pin e, the latter passing through the arm of the stud-plate DX. The pivoted end of the lever H is slightly beveled, and over this beveled end extends the beveled end ofthe spring-arm G. (See Fig. l.)

A stud or post, I, is east upon the righthand side of the stud-plate D", to which is pivoted the arm J, the upper end of which is bent at a right angle and extends over the lever H, while the lower portion extends downward to near the center line of the keeper and rests upon the face of the depression CX. The office of this arm is to limit the throw of the keeper in its backward action and hold the lever II down at the instant the end is released from the arm carrying the armature of the electro-magnet. The force and effect of this arm J are also limited bythe set-screw K and stud or pin KX.

IOO

The armature L is connected to the pivoted arm LX, the outer end of which is curved to form a catch or lip for the notch on the end of the lever H.

In operation, when the door is open and the bolt of the lock is swung back from the slot or socket a of the plate, the thin edge of the jaw j of the keeper is iiush with the face of the slot a, and the lower end of the bent arm J rests upon the back portion of the cam-keeper and prevents it from further movement in a backward direction, while the upper end of the bent arm .I rests upon the lever H, bearing it downward. away from contact with the catch or lip onmthe edge of the lever LX, in which position the parts are all set and the notch B free to receive the projecting pin AX. This open position of the keeper is maintained by the coiled spring D, and when the pin AX enters the space between the jaws f f X as the door is being shut it will strike against the jawfx, turning the keeper backward, causing the lower end ofthe curved lever to drop and relieve the pressure from the lever H. At the same time the spring-arm raises up the end of the latter against the lip or catch of the armatureplate, and the bolt of thedoor-lock is confined between the two jawsf and fX of the keeper, as in Fig. 8.

For the purpose of tripping the lever H in opening the door, I use an electro-magnet and an open circuit and connecting-wires of the same character as that described in my former Letters Patent.

The cores of the electro-magnet of my present invention are fixed to a stud or post, M, and the armature of the magnet to the horizontal lever, as heretofore described, and this armature is attracted by the magnet at all times when the circuit is established. Such movement releases the lever H, While the resilience of the spiral spring draws back the keeper to admit the looking-bolt of the doorlock, as described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

l. In an electric boltreleasing device of the character hereinr'deseribed, the cam or keeper provided with iixedjawsffx, lug C, and spiral spring D, the said keeper operating upon the pivot in the stud-plates DX D2 in the manner specified.

` 2. In au electric bolt-releasing device, and in combination with the cam or keeper constructed as above described, the lever H, pivoted armatureplate LX, bent pivoted arm J, and spring-arm G, the latter provided with a spring-plate, F, engaging with the lug C of the keeper for locking the same in the manner specified.

In testimony that I claim the foregoing I have hereunto set my hand and seal.

GEORGE LUIs HENZEL. [1.. s]

Vitnesses:

C. W. M. SMITH, (E1-ms.v E. KELLY. 

